External links open both in current tab and new tab when `google_analytics` enabled

[statnmap]

Describe the bug

When I click on "View Demo" on the website https://sourcethemes.com/academic/ this opens a new tab but also updates the tab I was in.

This is not the case when clicking on "View documentation" in the demo page: https://academic-demo.netlify.com/

I face the same behavior as sourcethemes.com on my website.

To Reproduce

Steps to reproduce the behavior:

1. Go to https://sourcethemes.com/academic/
2. Click on "View Demo"
3. See new tab opened and previous tab updated

I have seen the same behavior for some links in the documentation. If I do a Ctrl+Click on links like: "HTML color name" in this paragraph: https://sourcethemes.com/academic/docs/page-builder/#background

Expected behavior

The current tab should not be updated.

Technical details:

• Academic Version: 4.7 (4.6.3 also)
• Hugo Version: 0.60.1
• Browser/OS: Firefox / Ubuntu

[gcushen]

I can't yet reproduce the issue locally.

However, the live https://sourcethemes.com/academic/ site appears to have this issue in both Firefox and Chrome. With Safari, it has a different behaviour of just changing the current tab without opening a new tab.